Pre-Processors

This boilerplate has pre-configured CSS extraction for most popular CSS pre-processors including LESS, SASS, Stylus, and PostCSS. To use a pre-processor, all you need to do is installing the appropriate webpack loader for it. For example, to use SASS:

npm install sass-loader node-sass --save-dev

Note you also need to install node-sass because sass-loader depends on it as a peer dependency.

Using Pre-Processors inside Components

Once installed, you can use the pre-processors inside your *.vue components using the lang attribute on <style> tags:

<style lang="scss">
/* write SASS! */
</style>

A note on SASS syntax

• lang="scss" corresponds to the CSS-superset syntax (with curly braces and semicolones).
• lang="sass" corresponds to the indentation-based syntax.

PostCSS

Styles in *.vue files are piped through PostCSS by default, so you don't need to use a specific loader for it. You can simply add PostCSS plugins you want to use in build/webpack.base.conf.js under the vue block:

// build/webpack.base.conf.js
module.exports = {
  // ...
  vue: {
    postcss: [/* your plugins */]
  }
}

See vue-loader's related documentation for more details.

Standalone CSS Files

To ensure consistent extraction and processing, it is recommended to import global, standalone style files from your root App.vue component, for example:

<!-- App.vue -->
<style src="./styles/global.less" lang="less"></style>

Note you should probably only do this for the styles written by yourself for your application. For existing libraries e.g. Bootstrap or Semantic UI, you can place them inside /static and reference them directly in index.html. This avoids extra build time and also is better for browser caching. (See Static Asset Handling)